| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S8755-7223(18)30157-1 | |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30902400.ui | |
| subscription/membership/fee required | W.B. Saunders | http://journals.elsevierhealth.com/retrieve/pii/S8755-7223(18)30157-1 |